期刊
SURFACE & COATINGS TECHNOLOGY
卷 203, 期 20-21, 页码 3325-3331出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.surfcoat.2009.04.014
关键词
Silica coatings; Nanoindentation; Mechanical properties; Orthopaedic stainless steel
资金
- National Research Council of Argentina (CONICET)
- National University of Mar del Plata (UNMdP)
One way to enhance the surface properties of metals used as surgical implants such as wear or protective behaviour is to use hybrid organic-inorganic sol-gel coatings. The addition of SiO(2) colloidal particles to some hybrid formulation is thought to give films with bigger thickness than the coatings without particles, acting as mechanical reinforcement and to make an adequate surface to resist the extreme surgical procedures taking place in orthopaedic replacements. Coatings made by sol-gel with tetraethoxysilane (TEOS) and methyltriethoxysilane (MTES) with the addition of silica nanoparticles were applied onto surgical grade stainless steel. One of the most recent techniques used to study the mechanical properties of thin films is the instrumented indentation, known as nanoindentation, was used to evaluate elastic modulus, hardness and friction coefficient. This is a superficial technique used to measure quasi-statically the penetration of an indenter at increasing loads applied to very little volumes of material. The mechanical properties values found for the TEOS-MTES-10%SiO(2) coating are smaller than for the 30% filled coating, and higher that the coating without nanoparticles. In the scratch test of the TEOS-MTES-SiO(2) 30 wt.% coating it can be seen that in this case the failure takes place at higher applied load than for the less silica reinforced one, indicating a much better adhesion than the system with 10% of SiO(2) nanoparticles. (C) 2009 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据